#app{
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#app>form{
    width: 400px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    /* 上右下左 */
    padding: 50px 50px 100px 50px;
}

#app>form>h3 {
    text-align: center;
    margin-bottom: 50px;
}

.row {
    height: 50px;
    display: flex;
    align-items: center;
}

.row>span {
    height: 40px;
    line-height: 40px;
    width: 100px;
    font-weight: 500;
}

.row>input[type="text"],
.row>input[type="password"] {
    height: 40px;
    width: 200px;
    border-radius: 5px;
    border: none;
    outline: none;
    padding: 0 10px;
}

.row>input[type="submit"] {
    width: 100%;
    height: 40px;
    background-color: dodgerblue;
    color: white;
    border-radius: 5px;
    border: none;
}

.row>input[type="submit"]:active {
    background-color: gray;
}



.row-right {
    text-align: right;
}
.row-right>a {
    text-decoration: none;
}

.row>input[type="file"] {
    width: 160px;
}
.row>img {
    border-radius: 50%;
    width: 40px;
    height: 40px;
}

.error-message {
    color: red;
    font-size: 13px;
    height: 20px;
}